Yep, I just switched from the Nexus 5X to Moto X4. Nexus 5X only has 2 GB of RAM, which on recent versions of Android means apps are swapped out and shut down constantly. If you were browsing the internet and switched to a different app, you were guaranteed to have to reload the webpage from scratch if you didn't switch back to your browser within 5-10 seconds. Plus Snapchat was unusable due to camera lag and high memory requirements.
I'm still using a Nexus 4 with 2gb of RAM, running android 7. 6 was terrible performance, but it's been running well with 7; no issues with constant swapping or the like. The camera is absolutely atrocious, and the 8gb internal storage is really showing it's age, but it still runs everything really well for me - probably since I've never used apps like Facebook. The biggest issue so far has been a flash sector failure or a cosmic ray or something that forced me to wipe everything and reinstall from scratch.
I would have upgraded it in the last year or two but I can't find a phone I really want, nearly everything produced these days is a much larger form factor.
